PT-2019-4488 · Linux+5 · Linux Kernel+5
Tristan Madani
·
Published
2019-11-29
·
Updated
2020-06-18
·
CVE-2019-19768
CVSS v2.0
7.8
High
| Vector | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel version 5.4.0-rc2
Description
The issue is related to a use-after-free (read) in the
blk add trace function, which is used to fill out a blk io trace structure and place it in a per-cpu sub-buffer. This can potentially allow a remote attacker to cause a denial of service.Recommendations
For Linux kernel version 5.4.0-rc2, consider disabling the
blk add trace function as a temporary workaround until a patch is available. Restrict access to the blktrace.c module to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Centos
Linux Kernel
Red Hat
Suse
Ubuntu